RMBS: RAMBUS INC insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 2 sales totaling $1.08M in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-10-02 | Kissner Charles | Director | $555K | yes |
| 2026-09-22 | Kissner Charles | Director | $525K | yes |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-29 | 13G amendment | BlackRock, Inc. | 12.20% | SEC |
Institutional ownership (Q2 2026)
623 institutions reported holding $12.50B of RAMBUS INC on Form 13F (558 the quarter before). 131 opened a new position and 66 sold out. Shares held by institutions: -2%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 13,964,477 | $1.85B |
| FMR LLC | 10,460,026 | $1.39B |
| Invesco Ltd. | 6,632,458 | $880.39M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6,068,516 | $805.53M |
| VANGUARD CAPITAL MANAGEMENT LLC | 4,874,385 | $647.03M |
| STATE STREET CORP | 3,915,113 | $519.50M |
| GEODE CAPITAL MANAGEMENT, LLC | 2,297,660 | $305.06M |
| JPMORGAN CHASE & CO | 2,101,418 | $260.99M |
| DIMENSIONAL FUND ADVISORS LP | 1,719,400 | $228.19M |
| Swedbank AB | 1,646,500 | $218.56M |
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